build 17rc1 revealed one critical bug (a crash in most games with AI
with warfare) and a not totally critical bug (related to seafaring). See
below for links.
I fixed those, but it means we must take another testing round. This
also means that we will not make it for ubuntu - as usual. Since we are
not under any time pressure anymore, we can give rc2 some more time for
testing - I suggest two weeks. New release date for b17 is then the 23th
of April. Everybody d'accord?